How to set Reverse DNS (rDNS)

How to set Reverse DNS (rDNS)

The Reverse DNS (also known as rDNS or PTR record) for an IP should be set to the EHLO value that is sent in the outgoing mail header. This is generally the HostName of the computer, which should be different from the domain name. Recommended values for the Hostname include mail.domain.com or server.domain.com.

You can add reverse dns (rDNS) to any IP on your server by logging into ServerPortal.com

Login to your Codero Server Portal at www.serverportal.com

Click “Services” from the main menu, then select “My Services” from the drop down list.

Click the “Options” button adjacent to the server you wish add the IPs to (This icon will look like a Magnifying Glass)

Setting the Reverse DNS on your PRIMARY IP

If your are setting the rDNS on your primary IP, scroll down to the About This Service section and click the Edit button next to Primary Reverse DNS:, which is just below the Primary IP Address in the right column.

Setting the Reverse DNS on an ADDITIONAL IP

Scroll to the bottom of the page to Network Information. Locate the IP address you wish to add reverse DNS to and click Edit button located to the right under the Actions column.